`opt4.vn`

DNSSEC	⚠️ Not signed
A	14.225.206.207^{🇻🇳 VNPT-AS-VN14.225.206.0/24 VNPT}
NS	`ns1.dotvndns.vn` ⭐ ⚠️ Not in parent delegation
		A	2406:9c80::66^{🇻🇳 SUPERDATA2406:9c80::/48 -VN}
			PTR	`ns1.dotvndns.vn`
		A	112.213.89.3^{🇻🇳 SUPERDATA112.213.89.0/24 Vietnam Internet Network Information Center (VNNIC) 18 Nguyen Du Str, Hai Ba Trung District, Hanoi City, Vietnam 24th floor, VNTA Tower, Duong Dinh Nghe, Cau Giay, Hanoi}
			PTR	`ip-112-213-89-3.defastlink.net`
NS	`ns1.pavietnam.vn` ⚠️ Not in zone NS records
		A	2406:9c80::66^{🇻🇳 SUPERDATA2406:9c80::/48 -VN}
			PTR	`ns1.dotvndns.vn`
		A	112.213.89.3^{🇻🇳 SUPERDATA112.213.89.0/24 Vietnam Internet Network Information Center (VNNIC) 18 Nguyen Du Str, Hai Ba Trung District, Hanoi City, Vietnam 24th floor, VNTA Tower, Duong Dinh Nghe, Cau Giay, Hanoi}
			PTR	`ip-112-213-89-3.defastlink.net`
NS	`ns2.dotvndns.vn` ⚠️ Not in parent delegation
		A	2406:9c80::9000:111^{🇻🇳 SUPERDATA2406:9c80::/48 -VN}
			PTR	`ns2.dotvndns.vn`
		A	222.255.121.247^{🇻🇳 VDC222.255.121.0/24 VNPT}
			PTR	`ip-222-255-121-247.defastlink.net`
NS	`ns2.pavietnam.vn` ⚠️ Not in zone NS records
		A	2406:9c80::9000:111^{🇻🇳 SUPERDATA2406:9c80::/48 -VN}
			PTR	`ns2.dotvndns.vn`
		A	222.255.121.247^{🇻🇳 VDC222.255.121.0/24 VNPT}
			PTR	`ip-222-255-121-247.defastlink.net`
NS	`nsbak.pavietnam.net` ⚠️ Not in zone NS records
		A	2406:9c80::9000:302^{🇻🇳 SUPERDATA2406:9c80::/48 -VN}
			PTR	`nsbak.dotvndns.com`
		A	112.213.89.22^{🇻🇳 SUPERDATA112.213.89.0/24 Vietnam Internet Network Information Center (VNNIC) 18 Nguyen Du Str, Hai Ba Trung District, Hanoi City, Vietnam 24th floor, VNTA Tower, Duong Dinh Nghe, Cau Giay, Hanoi}
			PTR	`ns8922.dotvndns.vn`
MX	`opt4-vn.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:cc09::^{🇸🇬 Microsoft2a01:111:f000::/36}
			PTR	`mail-sg2pr03cu00500.inbound.protection.outlook.com`
		A	2a01:111:f403:cc1a::8^{🇯🇵 Microsoft2a01:111:f000::/36}
			PTR	`mail-tydpr03cu00100.inbound.protection.outlook.com`
		A	2a01:111:f403:cc1f::4^{🇯🇵 Microsoft2a01:111:f000::/36}
			PTR	`mail-os8pr02cu00104.inbound.protection.outlook.com`
		A	52.101.124.117^{🇯🇵 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-tydpr03cu00105.inbound.protection.outlook.com`
		A	52.101.137.0^{🇸🇬 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-sg2pr03cu00500.inbound.protection.outlook.com`
		A	52.101.157.80^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-os8pr02cu00100.inbound.protection.outlook.com`
TXT	`v=spf1 include:spf.protection.outlook.com -all`
TXT	`MS=ms99602705`
SOA	`ns1.dotvndns.vn`hostmaster@opt4.vn 2026-02-06 #6

`vn`

	DNSSEC	🔒 Signed (DS record present)
	NS	`dns-master.vnnic.vn` ⭐
	NS	`a.dns-servers.vn`
	NS	`b.dns-servers.vn`
	NS	`c.dns-servers.vn`
	NS	`d.dns-servers.vn`
	NS	`e.dns-servers.vn`
	NS	`f.dns-servers.vn`
	NS	`g.dns-servers.vn`
	NS	`h.dns-servers.vn`
	SOA	`dns-master.vnnic.vn`postmaster@vnnic.vn serial=2030732822

Subdomains

www.opt4.vn

Same first word

opt4.vn

opt4.co.nz

opt4.de

opt4.com

Similar names

4top.pl

top4.eu

4opt.ru

4top.ru

4top.cz

top4.biz

top4.online

top4.asia

4top.de

top4.be

4top.at

4top.nl

top4.ph

4top.com

top4.si

top4.org

4pot.com

top4.co

top4.fr

top4.com.br

top4.it

top4.ski

4top.fr

top4.xyz

top4.net

top4.de

4top.be

top4.co.uk

top4.com

4top.co.uk

top4.cn

top4.by

4top.it

top4.net.au

top4.com.au

pot4.com

DNS History

7 records (7 active, 0 former)

●NSns1.dotvndns.vn2026-05-01 → 2026-05-05 · 2 obs

● 2026-05-01 09:12:54
● 2026-05-05 09:22:18

●NSns1.pavietnam.vn2026-05-01 → 2026-05-05 · 2 obs

● 2026-05-01 09:12:54
● 2026-05-05 09:22:18

●NSns2.dotvndns.vn2026-05-01 → 2026-05-05 · 2 obs

● 2026-05-01 09:12:54
● 2026-05-05 09:22:18

●NSns2.pavietnam.vn2026-05-01 → 2026-05-05 · 2 obs

● 2026-05-01 09:12:54
● 2026-05-05 09:22:18

●NSnsbak.pavietnam.net2026-05-01 → 2026-05-05 · 2 obs

● 2026-05-01 09:12:54
● 2026-05-05 09:22:18

●MXopt4-vn.mail.protection.outlook.com2026-05-01 → 2026-05-05 · 2 obs

● 2026-05-01 09:12:54
● 2026-05-05 09:22:18

●A14.225.206.2072026-05-01 → 2026-05-05 · 2 obs

● 2026-05-01 09:12:54
● 2026-05-05 09:22:18

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
vn	c.dns-servers.vn, a.dns-servers.vn, e.dns-servers.vn, g.dns-servers.vn...	-
opt4.vn	nsbak.pavietnam.net, ns1.pavietnam.vn, ns2.pavietnam.vn	4 records

✅ Authoritative Response

Server:222.255.121.247

NS records: nsbak.pavietnam.net, ns1.pavietnam.vn, ns2.pavietnam.vn

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for opt4.vn (unsigned zone)

⏱️ Timing

Total: 2437ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`14.225.206.207`
NS	2	`ns1.dotvndns.vn, ns2.dotvndns.vn`
MX	1	`opt4-vn.mail.protection.outlook.com (pri`
TXT	2	`MS=ms99602705, v=spf1 include:spf.protection.outlook.co`
SOA	1	`ns1.dotvndns.vn hostmaster.opt4.vn`